/*
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    version 2 of the license, or (at your option) any later version.
*/

package net.rec.contra.cjbe.editor;

import javax.swing.*;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

/**
 * Listens for mouse clicks and manages linking into the constat pool.
 *
 * @author <a href="mailto:jclasslib@ej-technologies.com">Ingo Kegel</a>
 * @version $Revision: 1.1 $ $Date: 2006/09/25 16:00:58 $
 */
public class ConstantPoolHyperlinkListener extends MouseAdapter {

    private BrowserServices services;
    private int constantPoolIndex;

    /**
     * Constructor.
     *
     * @param services          the editor services
     * @param constantPoolIndex the index of the constant pool to lonk to.
     */
    public ConstantPoolHyperlinkListener(BrowserServices services, int constantPoolIndex) {

        this.services = services;
        this.constantPoolIndex = constantPoolIndex;
    }

    public void mouseClicked(MouseEvent event) {
        link(services, constantPoolIndex);
    }

    /**
     * Link to a specific constant pool entry.
     *
     * @param services          editor services
     * @param constantPoolIndex the index of the constant pool entry
     */
    public static void link(BrowserServices services, int constantPoolIndex) {

        if (constantPoolIndex <= 0) {
            return;
        }

        JTree tree = services.getBrowserComponent().getTreePane().getTree();
        TreePath newPath = linkPath(services, constantPoolIndex);
        tree.setSelectionPath(newPath);
        tree.scrollPathToVisible(newPath);
    }

    private static TreePath linkPath(BrowserServices services, int constantPoolIndex) {

        TreePath constantPoolPath = services.getBrowserComponent().getTreePane().getPathForCategory(BrowserTreeNode.NODE_CONSTANT_POOL);

        BrowserTreeNode constantPoolNode = (BrowserTreeNode) constantPoolPath.getLastPathComponent();
        TreeNode targetNode = constantPoolNode.getChildAt(constantPoolIndex - 1);
        TreePath linkPath = constantPoolPath.pathByAddingChild(targetNode);

        return linkPath;
    }

}

